Blueshift

//ˈbluːˌʃɪft// noun, verb

noun, verb ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A decrease in the wavelength of a photon or of light, corresponding to a higher frequency and a shift toward the blue end of the electromagnetic spectrum. countable, uncountable
Verb
  1. 1
    (ergative) (said of light or a photon) To shift toward the blue end of the electromagnetic spectrum; to change to a shorter wavelength and a higher frequency.

Etymology

From blue + shift.

Related phrases

doppler effect

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.